-x-3=-4x-15

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Solution for -x-3=-4x-15 equation: 



-x-3=-4x-15

We move all terms to the left:

-x-3-(-4x-15)=0

We add all the numbers together, and all the variables

-1x-(-4x-15)-3=0

We get rid of parentheses

-1x+4x+15-3=0

We add all the numbers together, and all the variables

3x+12=0

We move all terms containing x to the left, all other terms to the right

3x=-12

x=-12/3

x=-4

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